论文标题
Bremsstrahlung高频引力波的高尺度非热静脉发挥作用
Bremsstrahlung High-frequency Gravitational Wave Signatures of High-scale Non-thermal Leptogenesis
论文作者
论文摘要
通过在SEESAW模型中产生右手中微子的成对产生右中微子的非热静脉生殖。我们表明，与充气衰减相关的不可避免的Graviton Bremsstrahlung可能是非热静脉生成的独特探针。发射的引力促进了高频随机重力波背景，其特征偏移低于峰值频率。除了导致频率的下限（$ f \ gtrsim 10^{11} $ hz）外，Seesaw-Pertruttivity条件使该机制对最轻的中微子质量敏感。对于接近普朗克量表的充气质量，重力波有助于较大的深色辐射，该辐射在未来实验（例如CMB-S4和CMB-HD）的投影灵敏度限制之内。
Inflaton seeds non-thermal leptogenesis by pair producing right-handed neutrinos in the seesaw model. We show that the inevitable graviton bremsstrahlung associated with inflaton decay can be a unique probe of non-thermal leptogenesis. The emitted gravitons contribute to a high-frequency stochastic gravitational waves background with a characteristic fall-off below the peak frequency. Besides leading to a lower bound on the frequency ($f\gtrsim 10^{11}$ Hz), the seesaw-perturbativity condition makes the mechanism sensitive to the lightest neutrino mass. For an inflaton mass close to the Planck scale, the gravitational waves contribute to sizeable dark radiation, which is within the projected sensitivity limits of future experiments such as CMB-S4 and CMB-HD.
